.circleci: Add CUDA 10.2 to CI (#34241)
Summary:
Basically a re-do of https://github.com/pytorch/pytorch/pull/33471
Should be safe to merge now that https://github.com/pytorch/pytorch/issues/34135 has been merged.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34241
Differential Revision: D20292711
Pulled By: seemethere
fbshipit-source-id: c508b5ef58f52aa3a263fd33b0373f31719fa0a4
